A special type of fluorescent tube contains the gas helium. When energized, it is lit by certain colors. What is this process where colored light is emitted from an atom? - Quora
![🎈 Public Lab: Scan and compare different gases (in discharge tubes, like neon) using a DIY spectrometer 🎈 Public Lab: Scan and compare different gases (in discharge tubes, like neon) using a DIY spectrometer](https://publiclab.org/public/system/images/photos/000/022/121/original/Edelgase_in_Entladungsroehren.jpg)
🎈 Public Lab: Scan and compare different gases (in discharge tubes, like neon) using a DIY spectrometer
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Experimental methods for laboratory measurements of helium spectral line broadening in white dwarf photospheres: Physics of Plasmas: Vol 28, No 6
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